CVE-2026-46233

batman-adv: bla: only purge non-released claims

State: Published
Severity: Not scored
Published: May 28, 2026
Updated: Jun 14, 2026
Reserved: May 13, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: bla: only purge non-released claims

When batadv_bla_purge_claims() goes through the list of claims, it is only traversing the hash list with an rcu_read_lock(). Due to a potential parallel batadv_claim_put(), it can happen that it encounters a claim which was actually in the process of being released+freed by batadv_claim_release(). In this case, backbone_gw is set to NULL before the delayed RCU kfree is started. Calling batadv_bla_claim_get_backbone_gw() is then no longer allowed because it would cause a NULL-ptr derefence.

To avoid this, only claims with a valid reference counter must be purged. All others are already taken care of.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	23721387c409087fd3b97e274f34d3ddc0970b74 to before a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbeAffected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 6725c523a35eeca611ff37e7d4a8712fae92aefdAffected 23721387c409087fd3b97e274f34d3ddc0970b74 to before afb5436f6028fd68f408f189230fbaa19c910d72Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 7b8fbcee3184d848b5aee085ca16d0cf05c9b641Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfeAffected 23721387c409087fd3b97e274f34d3ddc0970b74 to before b65365d2b1e6095c538d49baeb140dd1c166c1b3Affected 23721387c409087fd3b97e274f34d3ddc0970b74 to before ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8dAffected 23721387c409087fd3b97e274f34d3ddc0970b74 to before cf6b604011591865ae39ac82de8978c1120d17afAffected
LinuxLinux	3.5Affected before 3.5Not affected 5.10.258 through 5.10.Not affected 5.15.209 through 5.15.Not affected 6.1.175 through 6.1.Not affected 6.6.140 through 6.6.Not affected 6.12.90 through 6.12.Not affected 6.18.32 through 6.18.Not affected 7.0.9 through 7.0.*Not affected 7.1 and laterNot affected

Product

Versions

LinuxLinux

23721387c409087fd3b97e274f34d3ddc0970b74 to before a9f58d5e3261f3deeae69ec1e237f38ef3ff5cbeAffected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 6725c523a35eeca611ff37e7d4a8712fae92aefdAffected
23721387c409087fd3b97e274f34d3ddc0970b74 to before afb5436f6028fd68f408f189230fbaa19c910d72Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 7b8fbcee3184d848b5aee085ca16d0cf05c9b641Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before 7b7ebb7222a5524ce58e48cc9c6d688320ea6cfeAffected
23721387c409087fd3b97e274f34d3ddc0970b74 to before b65365d2b1e6095c538d49baeb140dd1c166c1b3Affected
23721387c409087fd3b97e274f34d3ddc0970b74 to before ab3dbd07a809a8eb30c7ddfab9ac886ed30dce8dAffected
23721387c409087fd3b97e274f34d3ddc0970b74 to before cf6b604011591865ae39ac82de8978c1120d17afAffected

LinuxLinux

3.5Affected
before 3.5Not affected
5.10.258 through 5.10.*Not affected
5.15.209 through 5.15.*Not affected
6.1.175 through 6.1.*Not affected
6.6.140 through 6.6.*Not affected
6.12.90 through 6.12.*Not affected
6.18.32 through 6.18.*Not affected
7.0.9 through 7.0.*Not affected
7.1 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.